Both waterfalls have been on every day lately except for very cold days. The snow and mist effects have been disabled because they cause problems with mold inside the mountain and trip sensors on the ride track, causing the ride to shut down. I thought this was common knowledge on here? Bird-on-a-stick was a cheap looking effect and completely non-essential to the story. Does it really affect your ride experience in any way?
The thing with Everest is, it is primarily a roller coaster, not a ride that relies primarily on show elements to entertain you, like say, Dinosaur or Splash Mountain (or even Everest's "cousin", Revenge of the Mummy). Remove (disco) yeti and the shadow projection, and the rest of the show elements are the actual physical landscape you are riding through. Big Thunder Mountain, for example, is just as fun to me regardless of whether or not the rocks are falling or the bats on strings are... spinning around, tangled up.
That's why, while I can understand the annoyance with TDO's reluctance to fix the yeti, I don't understand why so much of the fan community considers Everest such a bad ride without it. You could say its just my opinion, but watch guests after they ride Everest - they absolutely love it, even without the yeti swinging its arm at them.